<span class="btn btn-info btn-file">
    <i class="fa fa-upload fa-fw"></i>
    {{btnName}} 
    <input type="file" accept="*" [multiple]="multiple" (change)="upLoad()">
</span>

<p *ngIf="help" class="help-block">{{help}}</p>

<div *ngFor="let f of filesArr">
    <p>{{f.name}}</p>
</div>

<div *ngIf="checkErrArr.length" style="color: red;">
    <div *ngFor="let errArr of checkErrArr">
        <p><strong>{{errArr.name}}</strong></p>
        <p *ngFor="let err of errArr.checkErr">{{err}}</p>
    </div>
</div>